-#!/bin/python
-# Migrates the machine named $1 from the dev cluster.
+#!/usr/bin/python
+# Migrates the machine passed as arguments from the dev cluster.
# To be run on the prod cluster.
-## The present version is NOT A REAL SCRIPT.
-## Things may not even be tested. Copy and paste.
-not_ready_yet_do_not_run_me
-
-
-from invirt import database
+from invirt import remctl as r
+from lib import database
+import subprocess
+import sys
dev_db_uri = 'postgres://sipb-xen@sipb-xen-dev.mit.edu/sipb_xen'
+database.connect(dev_db_uri)
+dev_sess = database.session
+database.connect()
+prod_sess = database.session
+## dump from dev db
def take_data(machine_name):
-## dump from dev db; save info well
- database.connect(dev_db_uri)
- database.session.begin()
- machine = database.Machine.query().get_by(name=machine_name)
- disks = database.Disk.query().filter_by(machine=machine).all()
- nics = database.NIC.query().filter_by(machine=machine).all()
-## remove from dev db; ideally atomic with dump
+ dev_sess.begin()
+ machine = dev_sess.query(database.Machine).filter_by(name=machine_name).one()
+
+ # Clean out the ACL just so we don't have to think about it
+ machine.acl = []
+ dev_sess.update(machine)
+
+ print 'VM Info:'
+ print ' name: %s' % machine.name
+ print ' description: %s' % machine.description
+ print ' cpus: %s' % machine.cpus
+ print ' memory: %s' % machine.memory
+ print ' owner: %s' % machine.owner
+ print ' contact: %s' % machine.contact
+ print ' administrator: %s' % machine.administrator
+ print ' uuid: %s' % machine.uuid
+ print ' type: %s' % machine.type.type_id
+ print ' autorestart: %s' % machine.autorestart
+ print ' adminable: %s' % machine.adminable
+ print ' Disks:'
+ for disk in machine.disks:
+ print ' - %s (%s)' % (disk.guest_device_name, disk.size)
+ print ' NICs:'
+ for nic in machine.nics:
+ print ' - %s, %s, %s' % (nic.mac_addr, nic.ip, nic.hostname)
+ print '==============================================='
+ print
+
+ disks = machine.disks
+ nics = machine.nics
for r in disks + nics + [machine]:
- database.session.delete(r)
- database.session.commit()
- return machine, disks, nics
-
-
-## shut down if up
-#remctl remote control $MACHINE destroy
-
-## copy disk image... copy, copy...
-## for each disk:
-lvname="d_${MACHINE}_${guest_device_name}"
-lvcreate xenvg -n "$lvname" -L "${size}"M
-ssh t-i dd if=/dev/xenvg/"$lvname" of=/dev/stdout bs=1M \
- | dd if=/dev/stdin of=/dev/xenvg/"$lvname" bs=1M
-
-## add to dev db
-def restore_data(machine, disks, nics):
- database.connect() # to prod DB
- database.session.begin()
- ## now copy machine, disks, nics to new ORM objects (yuck, oh well)
- ## and database.session.save(those)
- database.session.commit()
-
-
-## power on if desired
+ dev_sess.delete(r)
+
+ dev_sess.commit()
+
+ for r in disks + nics + [machine]:
+ dev_sess.expunge(r)
+ del r._instance_key
+
+ return machine
+## add to prod db
+def restore_data(machine, session):
+ # The machine's type is still the one attached to the dev database;
+ # get the right one
+ machine.type = session.query(database.Type).filter_by(type_id=machine.type.type_id).one()
+ session.begin()
+ session.save(machine)
+ session.commit()
+
+def migrate_vm(machine_name):
+ # Power off the VM on dev
+ #
+ # This has to be done first, because once the machine is deleted
+ # from the database, we can't remctl for it anymore
+ out, err = r.remctl('xvm-remote.mit.edu', 'control', machine_name, 'destroy', err=True)
+ print out
+
+ machine = take_data(machine_name)
+
+ success = True
+ ## copy disk image... copy, copy...
+ for disk in machine.disks:
+ lvname='d_%s_%s' % (machine.name, disk.guest_device_name)
+
+ if 0 != subprocess.call(['lvcreate', '-L%sM' % str(disk.size), '-n', lvname, 'xenvg']):
+ success = False
+
+ ssh = subprocess.Popen(['ssh', '-o', 'GSSAPIDelegateCredentials=no',
+ 'torchwood-institute.mit.edu',
+ 'dd', 'if=/dev/xenvg/%s' % lvname, 'bs=1M'],
+ stdout=subprocess.PIPE)
+ dd = subprocess.Popen(['dd', 'of=/dev/xenvg/%s' % lvname, 'bs=1M'],
+ stdin=ssh.stdout)
+ if 0 != dd.wait():
+ success = False
+ if 0 != ssh.wait():
+ success = False
+
+ if not success:
+ restore_data(machine, dev_sess)
+
+ print '==============================================='
+ print 'ERROR: VM %s failed to migrate' % machine.name
+ print '==============================================='
+ else:
+ restore_data(machine, prod_sess)
+if __name__ == '__main__':
+ for vm in sys.argv[1:]:
+ print '==============================================='
+ print 'Migrating %s' % vm
+ print '==============================================='
+ migrate_vm(vm.strip())
projects / invirt/scripts/prod-migration.git / blobdiff